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From: "David G. Johnston" <david.g.johnston@gmail.com>
Date: Fri, 26 Jan 2018 11:35:09 -0700
Message-ID: 
 <CAKFQuwajACsB5c1Ag1AsGoF5c2tkydtfdmzaDbB8xxOkrmaXHw@mail.gmail.com>
Subject: Re: pg_upgrade docs are confusing if PostgreSQL's versioning
 system/language isn't known to reader
To: Jim Ryan <jim@room118solutions.com>
Cc: Bruce Momjian <bruce@momjian.us>,
	"pgsql-docs@postgresql.org" <pgsql-docs@postgresql.org>
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On Friday, January 26, 2018, Jim Ryan <jim@room118solutions.com> wrote:

> Hey Bruce,
>
> Thanks for working on this, but wouldn't pg_upgrade be needed from 10.1 to
> 10.2?  Aren't those considered major versions, or am I misunderstanding?
>
> The source of my (and potentially others) confusion is if from 9.1 to 9.2
> is considered a major version change or not.  I think most users would
> assume from 9.x to 10.x is a major version change.  The ambiguity is in 9.x
> to 9.y.
>
>
Which is why we changed ;)

Starting with 10 the one and only value after the decimal is a minor
version bug fix release.  The next major version will be 11.

Of versions beginning with 9 there were 7 major versions - 9.0 to 9.6; the
third position value denoted the minor bug fix release.

pg-upgrade is only required for upgrading between major versions.

On our homeoage we list every major release that is currently supported.

David J.

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On Friday, January 26, 2018, Jim Ryan &lt;<a href=3D"mailto:jim@room118solu=
tions.com">jim@room118solutions.com</a>&gt; wrote:<br><blockquote class=3D"=
gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-=
left:1ex"><div dir=3D"ltr">Hey Bruce,<div><br></div><div>Thanks for working=
 on this, but wouldn&#39;t pg_upgrade be needed from 10.1 to 10.2?=C2=A0 Ar=
en&#39;t those considered major versions, or am I misunderstanding?</div><d=
iv><br></div><div>The source of my (and potentially others) confusion is if=
 from 9.1 to 9.2 is considered a major version change or not.=C2=A0 I think=
 most users would assume from 9.x to 10.x is a major version change.=C2=A0 =
The ambiguity is in 9.x to 9.y.=C2=A0=C2=A0</div><div><br></div></div></blo=
ckquote><div><br></div><div>Which is why we changed ;)</div><div><br></div>=
<div>Starting with 10 the one and only value after the decimal is a minor v=
ersion bug fix release.=C2=A0 The next major version will be 11.</div><div>=
<br></div><div>Of versions beginning with 9 there were 7 major versions - 9=
.0 to 9.6; the third position value denoted the minor bug fix release.</div=
><div><br></div><div>pg-upgrade is only required for upgrading between majo=
r versions.</div><div><br></div><div>On our homeoage we list every major re=
lease that is currently supported.</div><div><br></div><div>David J.</div>

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